The executors of Michael Jackson's estate posted a letter on fan sites Tuesday, expressing concern over the welfare of Jackson's mother Katherine and the late singer's three children, after a feud among family members lead to a scuffle at the children's home Monday.

The open letter from John Branca and John McClain said that while they have no standing to intervene in the guardianship of Jackson's children Paris, Prince Michael and Prince Michael II aka Blanket., they were taking what steps they could to protect them from "undue influences, bullying, greed, and other unfortunate circumstances."

Several of the singer's siblings have objected to being left out of Jackson's will, which left his estate to his mother and children.

Sandra L. Ribera, Katherine's attorney, said in a statement, "Jackson family members ambushed Katherine Jackson's home after their vehicle tore through security gates on the tails of the SUV containing Michael Jackson's children," adding, "An altercation ensued shortly thereafter and law enforcement arrived at the scene."

Los Angeles County Sheriff's Dept. spokesman Steve Whitmore confirmed, "Our deputies did determine that a minor scuffle occurred between two Jackson family members." TMZ.com identified Michael Jackson's siblings Janet and Jermaine in a photo taken outside the home.

Ribera said the children were subsequently transported to a safe location.

Katherine Jackson, 82, the children's guardian, was reported missing late Saturday by her nephew Trent, who said the family matriarch had not been heard from in a week. Shortly thereafter, she was located in Arizona visiting her daughter Rebbie. The children had remained at their Calabasas, Calif., estate.

Paris Jackson, 14, who tweeted Sunday that she hadn't been able to speak with her grandmother for a week, wrote Tuesday, "9 days and counting . . . so help me god i will make whoever did this pay."

A court appointed child advocate met with the children Monday night, said ABC News, and is working to reunite them with Katherine Jackson.